Tube for grain-drills.



Pat t 'L wv' PUINDEXTER. en ed Apr. 3, |900. TUBE FDR GRAIN xmms;j

(Application led Fab. 8, 1900.)

. said tube.

NITED STATES PATENIDFFICE. ,a

JOHN WV. POINDEXTER, OF OYNTHIANA, KENTUCKY.-

`TUBE FOR GBAlN-DRILLS.

SPECIFICATION forming part of Letters ratentNo. 646,872, dated 'April 3,190e.

Appiioationiea retrumye, 190e. senti Nugent. (No model.)

To tZZ whom it nung/concern:

Beit known that I,'JoHN W.-POINDEXTER, a citizen of the UnitedStates,fresidin g at Cynthiana, in the county of Harrison andState ofKentucky, have invented new and useful Improvements in Tubes forGrain-Drills, of which the following is a specification.

My invention relates* to grain-drill tubes; and the objects of the sameare to provide a tube whichwill be practically indestructible, whichwill be flexible, but will not chokeup or buckle, which can be appliedto grain-drills in present use, and which can be produced at a smallcost. I attain these objects and advantages by means of the constructionshown in the accompanying drawings, which form a part of thisspecification, and in which- Figure 1 is a side elevation of one .formof my improved tube attached to a grain-cup. Fig. 2 is a longitudinalsection of a modification thereof. Fig. 3 is a detail perspective of avalve or flap which I may attach to the discliargeend of the tube toprevent clogging of Fig. 4. is a detail'view showing different means forattachment of the tube to cups of .dierent shapes. Fig. 5 is a detailperspective of a combined tube and cup made in accordance with myinvention. Fig. 6 is a similar view of a modied form thereof. y

Like numerals of reference designate like parts in the different views.

Referring to Fig. l ofthe drawings, it will be seen that the tube ismade of. a single length of resilient wire Wound upon a mandrel, so thatthe contiguous convolutions or coils are in contact from end to end ofthe tube. The wire from which the tube is made is of gradually-reducedsize in cross-section from the upper to the lower end-that is to say,the wire is tapering in size. t The advantage gained by such a structureis that wherel a greater degree of flexibility is desirable (thedischarge end) the Wire from which this portion of the tube is formed isof a smaller gage than the upper end, which tits the cup, and the upperend is of necessity sufficiently large to make a iirm connection withsaid cup; Instead of making the tube of a single length of tapering wiresome of the advantages of this feature may be attained by the use ofmore than one gage of wire in the tube, as shown are connected byscrewing one into the other.

It'r three piecesv are used, the intermediate piece may be of anintermediate gage and all the pieces are connected together to form apractically-continuous tube. The tube is tapering from end to end, andthe numeral l designates the tube, and 2 3 two contiguous coils thereof.

vlA valve 4, consisting of adisk of substantially the required size tofit the dischargeopening 5 of the tube, is provided with two ears orlugs 6, and the lower coil of the tube is passed through perforations 7in the lugs 6 to hinge the valve in place.

^ As shown in Fig. 4, different means may be employed for holding theupper end of the tube' to the cup 8. The end of the wire may be formedinto a ring or loop.9, and a thumbnut l0 may be adjusted upon thevend ofthe wire to fasten the tube firmly to the cup, or the end of the wiremaybe bent inwardly, as at l1, to form a projection which will springinto a perforation 12 in the cup. The upper end of the tube may be madeflaring and of suchsize that two or more coils may be cut oif to makethe tube t a small cup, or any number of coils may be cut off to titdierent sizes of cups.

As shown in Fig. 5, a combined tube and cup lmay be formed either of asingle piece of wire or of several pieces of different gage, aspreviously described. Inv forming the cup portion the wire is loopedback and forth, as at 14, to form the upper porti'onof the cup, and thelower portion is then wound spirally, as hereinbefore described. In Fig.6 a piece of metal 8 is used to form a foundation for the cup.

From the foregoing it will be obvious that my tube is strong anddurable, will not buckle in use, and can be produced at a small cost.

The valve in the discharge end of the tube is set with its hinge towardthe front end of the tube, so that dirt cannot enter the opening to clogit. If there is a pressure upon the valve, it closes, but immediatelyopens when the pressure is removed.'

roo

Having thus fully described my invention, what I claim is- 1. A combinedgrain-drill tube and cup made of Wire coiled spil-ally to form the tube,

of a disk hinged to the outer coil of the tube, substantially asdescribed.

4. A combined graindrill tube and cup formed of Wire coiled spirally toform the tube and the cup being formed by loops in wire of larger gagethan the wire from which the tube is formed, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOHN W. POINDEXTER.

Witnesses:

F. G. RADELFINGER, BENNETT F. JoNEs.

